Method for providing topology awareness information within an IP network
a topology awareness and network technology, applied in the field of providing topology awareness information within an ip network, can solve the problems of large number of redundant probing messages, large amount of overhead signalling, and needing retransmission on the application layer
Active Publication Date: 2010-04-27
NETABOCKET
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AI Technical Summary
Benefits of technology
The system reduces signalling overhead, increases robustness, and enables efficient management of a large number of probes, providing accurate and scalable topology awareness in heterogeneous IP networks.
Problems solved by technology
The unreliable nature of SNMP implies that retransmissions on the application layer will be needed.
The amount of overhead signalling can be quite overwhelming if complete topology awareness is desired.
This results in a fairly large number of redundant probing messages.
If the topology awareness system is a critical component in a larger system, it is likely that there will be very strict requirements for robustness.
It is however somewhat vulnerable.
If topology awareness is implemented in every router in a large domain, managing connections to all those probes gets complex.
Method used
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Experimental program
Comparison scheme
Effect test
case 2a
[0089]In case 2a, the probe will keep its relation to the central node 502 of the system and deliver all its topology information directly to it. In case 2b, the probe P will receive topology information from other probes P and deliver that, together with its own topology information, to the central node 502 of the system. In case 2c, the probe will tear down its relation to the central node of the system and establish a new one with an aggregation point identified in the redirect message.
[0090]Note that the details of how the aggregation decisions are made are not within the scope of this invention. It may, however be useful to enable probes to indicate their willingness to become aggregation points, i.e. forwarding topology information from other probes in addition to its own information, and include that in the decision making algorithm. It is obvious that both memory and processing requirements will be greater at aggregation probes P than at regular probes P.
[0091]A signalling s...
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A method, a unit and a computer program product for providing topology awareness information within an IP network includes a central node and a plurality of routers, wherein the probe is implemented in a router within the IP network and the probe belongs to a topology awareness system, that includes: elements for obtaining and maintaining relationship with other probes within the IP network, elements for collecting information about other network elements e.g. routers and switches, elements for communicating topology information with the central node of the topology awareness system, and elements for obtaining information concerning local resources on the router where the probe is implemented.
Description
FIELD OF THE INVENTION[0001]The present invention relates to an Internet Protocol (IP) network.[0002]In particular, it relates to a method, a topology awareness unit and a computer program product that provides a topology awareness system within the IP network.BACKGROUND OF THE INVENTION[0003]Many communication networks are migrating towards all-IP solutions. As the variety of applications based on IP networks grow, the need for sophisticated control and management systems increases. IP networks are by nature de-centralised. Each network node, i.e., router, can operate individually without the control of a central authority. There are applications that would benefit from central control and network operators often want to be in control of their network using a single centralised operations centre. In other words, applications or systems that need information on how routers are interconnected and how they route traffic between each other are becoming more common.[0004]Herein, all sys...
Claims
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IPC IPC(8): H04L12/28H04L45/02H04L45/42
CPCH04L41/0213H04L41/12H04L45/42H04L45/02H04L41/22
InventorNORRGARD, JOAKIMSCHELEN, OLOVSVANBERG, EMILALLDEN, JOHAN
OwnerNETABOCKET